{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T01:36:41Z","timestamp":1747186601766,"version":"3.40.5"},"reference-count":36,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2024,1,25]],"date-time":"2024-01-25T00:00:00Z","timestamp":1706140800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100009619","name":"Japan Agency for Medical Research and Development","doi-asserted-by":"publisher","award":["19gk0110049h0001"],"award-info":[{"award-number":["19gk0110049h0001"]}],"id":[{"id":"10.13039\/100009619","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Obstet and Gynaecol"],"published-print":{"date-parts":[[2024,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>The present study aimed to estimate the total numbers of obstetric diseases diagnosed, total amounts of medical expenses claimed for obstetric diseases, their averages per livebirth, and yearly trends in Japan.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This is a secondary analysis of the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) (data from 2015 to 2019). The target population was women of reproductive age (15\u201349\u2009years old) with diseases in pregnancy, childbirth, and the puerperium, defined by having O codes according to the International Classification of Diseases 10th Revision. We calculated the numbers of obstetric diseases diagnosed, amounts of medical expenses claimed for obstetric diseases marked with the \u201cmain injury\/disease decision flag,\u201d and the totals divided by the annual numbers of livebirths, by year and women's age group.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>From 2015 to 2019, both the numbers of obstetric diseases diagnosed and amounts of medical expenses claimed for obstetric diseases per livebirth were on an upward trend, whereas the total numbers of obstetric diseases diagnosed were decreased. Women in advanced age groups had a higher number of diagnoses and a higher amount of medical expenses for obstetric diseases per livebirth. \u201cPreterm labour without delivery\u201d had the highest amounts of medical expenses claimed for and the second highest numbers of diagnoses throughout the study period.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>This study suggests that pregnant women in Japan would have an increasing number of obstetric complications and necessary medical expenses year by year. Further study is warranted to elucidate these trends and identify possible mitigation measures.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jog.15891","type":"journal-article","created":{"date-parts":[[2024,1,26]],"date-time":"2024-01-26T07:04:00Z","timestamp":1706252640000},"page":"596-603","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Annual numbers of diagnoses and medical expenses for obstetric diseases in Japan: A report from the National Database of Health Insurance Claims"],"prefix":"10.1111","volume":"50","author":[{"given":"Chie","family":"Nagata","sequence":"first","affiliation":[{"name":"Department of Health Policy National Center for Child Health and Development  Tokyo Japan"},{"name":"Center for Postgraduate Education and Training National Center for Child Health and Development  Tokyo Japan"},{"name":"Department of Obstetrics and Gynecology The Jikei University School of Medicine  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maiko","family":"Suto","sequence":"additional","affiliation":[{"name":"Department of Health Policy National Center for Child Health and Development  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naho","family":"Morisaki","sequence":"additional","affiliation":[{"name":"Department of Social Medicine National Center for Child Health and Development  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tohru","family":"Kobayashi","sequence":"additional","affiliation":[{"name":"Department of Data Science National Center for Child Health and Development  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5957-600X","authenticated-orcid":false,"given":"Kenji","family":"Takehara","sequence":"additional","affiliation":[{"name":"Department of Health Policy National Center for Child Health and Development  Tokyo Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,1,25]]},"reference":[{"key":"e_1_2_8_2_1","unstructured":"WHO UNICEF UNFPA World Bank Group and the United Nations Population Division.Maternal mortality ratio (Modeled estimate per 100 000 live births).2017."},{"key":"e_1_2_8_3_1","unstructured":"UN Inter\u2010agency Group for Child Mortality Estimation (UNICEF WHO World Bank UN DESA Population Division).Mortality rate neonatal (per 1 000 live births).2020."},{"key":"e_1_2_8_4_1","unstructured":"National Statistics Center.Live births and percent distribution by live birth order and age (5\u2010year age groups) of mother Japan.2020."},{"key":"e_1_2_8_5_1","unstructured":"National Statistics Center.Live births and percent distribution by live birth order and age (5\u2010year age groups) of mother Japan (Japanese).1990."},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/rmb2.12494"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.20344\/amp.11057"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2018.08.034"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12884-017-1540-0"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.fertnstert.2015.09.007"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1111\/1471-0528.15227"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12884-019-2213-y"},{"key":"e_1_2_8_13_1","unstructured":"Perinatal Committee Japan Society of Obstetrics and Gynecology.Request for Cooperation for the Perinatal Registry Project and Research Based on Registry Data (Japanese). Available from:https:\/\/www.jsog.or.jp\/activity\/pdf\/Clinical_research_2017\u201069\u20102.pdf. Accessed February 22 2023"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1186\/s13023-022-02290-0"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11657-022-01096-8"},{"key":"e_1_2_8_16_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00383-022-05079-1"},{"key":"e_1_2_8_17_1","doi-asserted-by":"publisher","DOI":"10.2188\/jea.JE20210074"},{"key":"e_1_2_8_18_1","doi-asserted-by":"publisher","DOI":"10.1111\/1756-185X.13974"},{"key":"e_1_2_8_19_1","doi-asserted-by":"publisher","DOI":"10.1111\/jog.14772"},{"key":"e_1_2_8_20_1","doi-asserted-by":"publisher","DOI":"10.1111\/jog.13518"},{"key":"e_1_2_8_21_1","unstructured":"Ministry of Health Labour and Welfare.[NDB] Homepage for Provision of Anonymous Receipt Information and Anonymous Information on Specific Health Checkups (Japanese). Available from:https:\/\/www.mhlw.go.jp\/stf\/seisakunitsuite\/bunya\/kenkou_iryou\/iryouhoken\/reseputo\/index.html. Accessed January 31 2023"},{"key":"e_1_2_8_22_1","unstructured":"Health Insurance BureauMinistry of Health Labour and Welfare.Manual for prospective NDB users (Japanese)."},{"key":"e_1_2_8_23_1","unstructured":"Ministry of Health Labour and Welfare.Guidelines for Provision of Anonymous Receipt Information and Anonymous Information on Specified Health Checkups (Japanese).2022."},{"key":"e_1_2_8_24_1","unstructured":"National Statistics Center.Annual number and percentage of livebirths and fertility rate by mother's age (5\u2010year age groups) (per thousand) (Japanese)."},{"key":"e_1_2_8_25_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0000000000004972"},{"key":"e_1_2_8_26_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2021.04.233"},{"key":"e_1_2_8_27_1","doi-asserted-by":"publisher","DOI":"10.1161\/JAHA.121.025050"},{"key":"e_1_2_8_28_1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.2021.7217"},{"key":"e_1_2_8_29_1","doi-asserted-by":"publisher","DOI":"10.1111\/ppe.12685"},{"key":"e_1_2_8_30_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.eurox.2020.100109"},{"key":"e_1_2_8_31_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-019-38999-5"},{"key":"e_1_2_8_32_1","doi-asserted-by":"publisher","DOI":"10.1080\/14767058.2019.1605592"},{"volume-title":"Trends in live births and percent distribution by period of gestation (4\u2010week divisions, early\u2010normal\u2010mature relisted)","year":"2021","author":"National Statistics Center","key":"e_1_2_8_33_1"},{"key":"e_1_2_8_34_1","unstructured":"National Statistics Center.Survey on welfare recipients (Japanese) 2015\u20132019."},{"key":"e_1_2_8_35_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12891-021-04259-9"},{"key":"e_1_2_8_36_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10384-021-00816-w"},{"key":"e_1_2_8_37_1","doi-asserted-by":"publisher","DOI":"10.1111\/jdi.13641"}],"container-title":["Journal of Obstetrics and Gynaecology Research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/jog.15891","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,4,3]],"date-time":"2024-04-03T04:53:09Z","timestamp":1712119989000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1111\/jog.15891"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,1,25]]},"references-count":36,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2024,4]]}},"alternative-id":["10.1111\/jog.15891"],"URL":"https:\/\/doi.org\/10.1111\/jog.15891","archive":["Portico"],"relation":{},"ISSN":["1341-8076","1447-0756"],"issn-type":[{"type":"print","value":"1341-8076"},{"type":"electronic","value":"1447-0756"}],"subject":[],"published":{"date-parts":[[2024,1,25]]},"assertion":[{"value":"2023-06-20","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2024-01-09","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2024-01-25","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}